I had a 2010 Speedmaster for several months and found slow tight turns difficult, especially with the too powerful grabby brakes. My hand always seems restricted by the proximity of the grips to the tank.
When a police knocked me off the bike had to go into the dealership for repairs and they loaned me a Bonneville. I had to concede that with the exception of looks the Bonneville bettered the Speedmaster in every area and purchased the Bonneville. Lighter, far better handling, progressive brakes, more comfortable.
But I intend to trade up for a Street Triple at the end of next year, hoping that will give me even more of the above benefits (although if i could find an America with apes).
Merry Biking Xmas :-)